TCP CFL Spring A Lamp, 150W Equivalent, Soft White (2700K), Spiral Light Bulb, Medium (E26) Base Replaces Standard incandescent 150-watt light bulb Compact Flourescent Bulbs use 75% less energy with same light output Lifetime: 9.1 years Uses 42 watts vs. 150 watts, saving you $118 over life of the bulbs Not Dimmable Estimated Annual Energy Cost to Operate: $5.06/bulb